react-native-esc-pos-printer/lib/commonjs/printer/printHelpers/monitorPrinter.js

An unofficial React Native library for printing on an EPSON TM printer with the Epson ePOS SDK for iOS and Epson ePOS SDK for Android

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.monitorPrinter = monitorPrinter;
function wait(ms) {
  return new Promise(resolve => {
    setTimeout(resolve, ms);
  });
}
function monitorPrinter(printer, listener, interval = 5000) {
  let isMonitoring = true;
  async function performMonitor() {
    await printer.addQueueTask(async () => {
      try {
        await printer.connect();
      } catch (error) {}
      const status = await printer.getStatus();
      listener(status);
      await printer.disconnect();
      return status;
    });
    await wait(interval);
    if (isMonitoring) {
      await performMonitor();
    }
  }
  performMonitor();
  return () => {
    isMonitoring = false;
  };
}
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